<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .box{
            width: 100vw;
            height: 100vh;
            position: fixed;
            left: 0;
            top: 0;
            padding-bottom: 10rem;
            overflow-y: scroll;
            background-color: darkslateblue;
        }
        .line{
            width: 100vw;
            height: 30vh;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
        <div class="line">12313</div>
    </div>
    <script>
         
    </script>
</body>
</html>